#include<stdio.h>
#include<string.h>

int main()
{
  const char* msg0="hello,printf\n";
  const char* msg1="hello,fwrite\n";
  const char* msg2="hello,write\n";

  printf("%s",msg0);
  fwrite(msg1,strlen(msg0),1,stdout);
  write(1,msg2,strlen(msg2));
  fork();
  return 0;
}
